patch-1.3.100 linux/fs/binfmt_java.c

• Lines: 188
• Date: Wed May 8 18:28:01 1996
• Orig file: v1.3.99/linux/fs/binfmt_java.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.99/linux/fs/binfmt_java.c linux/fs/binfmt_java.c
@@ -0,0 +1,187 @@
+/*
+ *  linux/fs/binfmt_java.c
+ *
+ *  Copyright (C) 1996  Brian A. Lantz
+ *  derived from binfmt_script.c
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/malloc.h>
+#include <linux/binfmts.h>
+#include <paths.h>
+
+#define _PATH_JAVA	"/usr/local/java/bin/java"
+#define _PATH_APPLET	"/usr/local/java/bin/appletviewer"
+#define _PATH_BASH	"/bin/bash"
+
+static int do_load_script(struct linux_binprm *bprm,struct pt_regs *regs)
+{
+	char *cp, *interp, *i_name;
+	int retval;
+	unsigned char *ucp = (unsigned char *) bprm->buf;
+	if ((ucp[0] != 0xca) || (ucp[1] != 0xfe) || (ucp[2] != 0xba) || (ucp[3] != 0xbe)) 
+		return -ENOEXEC;
+
+	iput(bprm->inode);
+	bprm->dont_iput=1;
+
+	/*
+	 * OK, we've set the interpreter name
+	 * Splice in (1) the interpreter's name for argv[0] (_PATH_BASH)
+	 *           (2) the name of the java wrapper for argv[1] (_PATH_JAVA)
+	 *           (3) filename of Java class (replace argv[0])
+	 *               without leading path or trailing '.class'
+	 *
+	 * This is done in reverse order, because of how the
+	 * user environment and arguments are stored.
+	 */
+	remove_arg_zero(bprm);
+	if ((cp = strstr (bprm->filename, ".class")) != NULL)
+		*cp = 0;
+	if ((i_name = strrchr (bprm->filename, '/')) != NULL)
+		i_name++;
+	else
+		i_name = bprm->filename;
+	bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
+	bprm->argc++;
+
+	strcpy (bprm->buf, _PATH_JAVA);
+	cp = bprm->buf;
+	bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
+	bprm->argc++;
+
+	strcpy (bprm->buf, _PATH_BASH);
+	interp = bprm->buf;
+	if ((i_name = strrchr (bprm->buf, '/')) != NULL)
+		i_name++;
+	else
+		i_name = bprm->buf;
+	bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
+	bprm->argc++;
+	if (!bprm->p) 
+		return -E2BIG;
+	/*
+	 * OK, now restart the process with the interpreter's inode.
+	 * Note that we use open_namei() as the name is now in kernel
+	 * space, and we don't need to copy it.
+	 */
+	retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
+	if (retval)
+		return retval;
+	bprm->dont_iput=0;
+	retval=prepare_binprm(bprm);
+	if(retval<0)
+		return retval;
+
+	return search_binary_handler(bprm,regs);
+}
+
+static int do_load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
+{
+	char *cp, *interp, *i_name;
+	int retval;
+	if (strncmp (bprm->buf, "<!--applet", 10))
+		return -ENOEXEC;
+
+	iput(bprm->inode);
+	bprm->dont_iput=1;
+
+	/*
+	 * OK, we've set the interpreter name
+	 * Splice in (1) the interpreter's name for argv[0] (_PATH_BSHELL)
+	 *           (2) the name of the appletviewer wrapper for argv[1] (_PATH_APPLET)
+	 *           (3) filename of html file (replace argv[0])
+	 *
+	 * This is done in reverse order, because of how the
+	 * user environment and arguments are stored.
+	 */
+	remove_arg_zero(bprm);
+	i_name = bprm->filename;
+	bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
+	bprm->argc++;
+
+	strcpy (bprm->buf, _PATH_APPLET);
+	cp = bprm->buf;
+	bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
+	bprm->argc++;
+
+	strcpy (bprm->buf, _PATH_BSHELL);
+	interp = bprm->buf;
+	if ((i_name = strrchr (bprm->buf, '/')) != NULL)
+		i_name++;
+	else
+		i_name = bprm->buf;
+	bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
+	bprm->argc++;
+	if (!bprm->p) 
+		return -E2BIG;
+	/*
+	 * OK, now restart the process with the interpreter's inode.
+	 * Note that we use open_namei() as the name is now in kernel
+	 * space, and we don't need to copy it.
+	 */
+	retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
+	if (retval)
+		return retval;
+	bprm->dont_iput=0;
+	retval=prepare_binprm(bprm);
+	if(retval<0)
+		return retval;
+
+	return search_binary_handler(bprm,regs);
+}
+
+static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
+{
+	int retval;
+	MOD_INC_USE_COUNT;
+	retval = do_load_script(bprm,regs);
+	MOD_DEC_USE_COUNT;
+	return retval;
+}
+
+struct linux_binfmt java_format = {
+#ifndef MODULE
+	NULL, 0, load_script, NULL, NULL
+#else
+	NULL, &mod_use_count_, load_script, NULL, NULL
+#endif
+};
+
+static int load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
+{
+	int retval;
+	MOD_INC_USE_COUNT;
+	retval = do_load_applet(bprm,regs);
+	MOD_DEC_USE_COUNT;
+	return retval;
+}
+
+struct linux_binfmt applet_format = {
+#ifndef MODULE
+	NULL, 0, load_applet, NULL, NULL
+#else
+	NULL, &mod_use_count_, load_applet, NULL, NULL
+#endif
+};
+
+int init_java_binfmt(void) {
+	printk(KERN_INFO "JAVA Binary support v1.01 for Linux 1.3.98 (C)1996 Brian A. Lantz\n");
+	register_binfmt(&java_format);
+	return register_binfmt(&applet_format);
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+	return init_java_binfmt();
+}
+
+void cleanup_module( void) {
+	printk(KERN_INFO "Removing JAVA Binary support...\n");
+	unregister_binfmt(&java_format);
+	unregister_binfmt(&applet_format);
+}
+#endif